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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
01/09/1997 |
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Data da última atualização: |
12/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PURCINO, A. A. C.; PAIVA, E.; SILVA, M. R.; ANDRADE, S. R. M. |
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Afiliação: |
ANTONIO ALVARO CORSETTI PURCINO, CNPMS. |
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Título: |
Influence of Azospirillum inoculation and nitrogen supply on grain yield, and carbon: and nitrogen-assimilating enzymes in maize. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Journal of Plant Nutrition, New York, v. 19, n. 7, p. 1045-1060, 1996. |
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Idioma: |
Inglês |
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Conteúdo: |
Nitrogen (N) supply increased yield, leaf % N at 10 days after silking (DAS) and at harvesting, the contents of ribulose-1,5-bisphosphate carboxylase (RUBISCO) and soluble protein, and the activities of phosphoenolpyruvate carboxylase (PEPC), and ferredoxin-glutamate synthase (fd-GOGAT), but not of glutamine synthetase (GS) for six tropical maize (Zea mays L.) cultivars. Compared to plants fertilized with 10 kg N/ha, plants inoculated with a mixture of Azospirillum sp. (strains Sp 82, Sp 242, and Sp Eng-501) had increased grain % protein, and leaf % N at 10 DAS and at harvest, but not grain yield. Compared to plants fertilized with either 60 or 180 kg N/ha, Azospirillum inoculated plants yielded significantly less, and except for GS activity, which was not influenced by N supply, had lower values for leaf % N at 10 DAS and at harvest, for contents of soluble protein and RUBISCO, and for the activities of PEPC and fd-GOGAT. Yield was positively correlated to leaf % N both at 10 DAS and at harvest to the contents of soluble protein and RUBISCO, and to the activities of PEPC and Fd-GOGAT, but not of GS, when RUBISCO contents and enzyme activities were calculated per g fresh weight/min. However, when enzyme contents and enzyme activities were expressed per mg soluble protein/min, yield was correlated positively to RUBISCO and PEPC, but negatively to GS. These results give syupport to the hypothesis that RUBISCO, fd-GOGAT, and PEPC may be used as biochemical markers for the development of genotypes with (...) MenosNitrogen (N) supply increased yield, leaf % N at 10 days after silking (DAS) and at harvesting, the contents of ribulose-1,5-bisphosphate carboxylase (RUBISCO) and soluble protein, and the activities of phosphoenolpyruvate carboxylase (PEPC), and ferredoxin-glutamate synthase (fd-GOGAT), but not of glutamine synthetase (GS) for six tropical maize (Zea mays L.) cultivars. Compared to plants fertilized with 10 kg N/ha, plants inoculated with a mixture of Azospirillum sp. (strains Sp 82, Sp 242, and Sp Eng-501) had increased grain % protein, and leaf % N at 10 DAS and at harvest, but not grain yield. Compared to plants fertilized with either 60 or 180 kg N/ha, Azospirillum inoculated plants yielded significantly less, and except for GS activity, which was not influenced by N supply, had lower values for leaf % N at 10 DAS and at harvest, for contents of soluble protein and RUBISCO, and for the activities of PEPC and fd-GOGAT. Yield was positively correlated to leaf % N both at 10 DAS and at harvest to the contents of soluble protein and RUBISCO, and to the activities of PEPC and Fd-GOGAT, but not of GS, when RUBISCO contents and enzyme activities were calculated per g fresh weight/min. However, when enzyme contents and enzyme activities were expressed per mg soluble protein/min, yield was correlated positively to RUBISCO and PEPC, but negatively to GS. These results give syupport to the hypothesis that RUBISCO, fd-GOGAT, and PEPC may be used as biochemical markers for the devel... Mostrar Tudo |
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Palavras-Chave: |
Enzyme; Fixacao; Maize; Nitrogen fixing. |
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Thesagro: |
Bactéria; Enzima; Inoculação; Milho; Nitrogênio; Nutrição Vegetal; Zea Mays. |
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Thesaurus Nal: |
Azospirillum; plant nutrition. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 02418naa a2200313 a 4500
001 1476097
005 2018-06-12
008 1996 bl uuuu u00u1 u #d
100 1 $aPURCINO, A. A. C.
245 $aInfluence of Azospirillum inoculation and nitrogen supply on grain yield, and carbon$band nitrogen-assimilating enzymes in maize.$h[electronic resource]
260 $c1996
520 $aNitrogen (N) supply increased yield, leaf % N at 10 days after silking (DAS) and at harvesting, the contents of ribulose-1,5-bisphosphate carboxylase (RUBISCO) and soluble protein, and the activities of phosphoenolpyruvate carboxylase (PEPC), and ferredoxin-glutamate synthase (fd-GOGAT), but not of glutamine synthetase (GS) for six tropical maize (Zea mays L.) cultivars. Compared to plants fertilized with 10 kg N/ha, plants inoculated with a mixture of Azospirillum sp. (strains Sp 82, Sp 242, and Sp Eng-501) had increased grain % protein, and leaf % N at 10 DAS and at harvest, but not grain yield. Compared to plants fertilized with either 60 or 180 kg N/ha, Azospirillum inoculated plants yielded significantly less, and except for GS activity, which was not influenced by N supply, had lower values for leaf % N at 10 DAS and at harvest, for contents of soluble protein and RUBISCO, and for the activities of PEPC and fd-GOGAT. Yield was positively correlated to leaf % N both at 10 DAS and at harvest to the contents of soluble protein and RUBISCO, and to the activities of PEPC and Fd-GOGAT, but not of GS, when RUBISCO contents and enzyme activities were calculated per g fresh weight/min. However, when enzyme contents and enzyme activities were expressed per mg soluble protein/min, yield was correlated positively to RUBISCO and PEPC, but negatively to GS. These results give syupport to the hypothesis that RUBISCO, fd-GOGAT, and PEPC may be used as biochemical markers for the development of genotypes with (...)
650 $aAzospirillum
650 $aplant nutrition
650 $aBactéria
650 $aEnzima
650 $aInoculação
650 $aMilho
650 $aNitrogênio
650 $aNutrição Vegetal
650 $aZea Mays
653 $aEnzyme
653 $aFixacao
653 $aMaize
653 $aNitrogen fixing
700 1 $aPAIVA, E.
700 1 $aSILVA, M. R.
700 1 $aANDRADE, S. R. M.
773 $tJournal of Plant Nutrition, New York$gv. 19, n. 7, p. 1045-1060, 1996.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Cerrados; Embrapa Meio Ambiente. |
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Data corrente: |
01/03/2023 |
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Data da última atualização: |
06/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 3 |
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Autoria: |
SANO, E. E.; BOLFE, E. L.; PARREIRAS, T. C.; BETTIOL, G. M.; VICENTE, L. E.; DEL'ARCO SANCHES, I.; VICTORIA, D. de C. |
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Afiliação: |
EDSON EYJI SANO, CPAC; EDSON LUIS BOLFE, CNPTIA; TAYA CRISTO PARREIRAS, UNIVERSIDADE ESTADUAL DE CAMPINAS; GIOVANA MARANHAO BETTIOL, CPAC; LUIZ EDUARDO VICENTE, CNPMA; IARA DEL´ARCO SANCHES, INSTITUTO DE PESQUISAS ESPACIAIS; DANIEL DE CASTRO VICTORIA, CNPTIA. |
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Título: |
Estimating double cropping plantations in the Brazilian Cerrado through PlanetScope monthly mosaics. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Land, v. 12, n. 3, 581, 2023. |
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DOI: |
https://doi.org/10.3390/land12030581 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Farmers in the Brazilian Cerrado are increasing grain production by cultivating second crops during the same crop growing season. The release of PlanetScope (PS) satellite images represents an innovative opportunity to monitor double cropping production. In this study, we analyzed the potential of six PS monthly mosaics from the 2021/2022 crop growing season to discriminate double cropping areas in the municipality of Goiatuba, Goiás State, Brazil. The four multispectral bands of the PS images were converted into normalized difference vegetation index (NDVI), enhanced vegetation index (EVI), green-red normalized difference index (GRNDI), and textural features derived from the gray-level co-occurrence matrix (GLCM). The ten most important combinations of these attributes were used to map double cropping systems and other land use and land cover classes (cultivated pasture, sugarcane, and native vegetation) of the municipality through the Random Forest classifier. Training and validation samples were obtained from field campaigns conducted in October 2021 and April 2022. PS mosaic from February 2022 was the most relevant data. The overall accuracy and Kappa index of the final map were 92.2% and 0.892, respectively, with an accuracy confidence of 81%. This approach can be expanded for mapping and monitoring other agricultural frontiers in the Cerrado biome. |
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Palavras-Chave: |
Cobertura da terra; Constelação de satélites; Floresta aleatória; Gray-level co-occurrence matrix; GRNDI; Land use and land cover mapping; Mapeamento de cobertura da terra; Mapeamento do uso da terra; Matriz de coocorrência em nível de cinza; Random forest; Satellite constellation; Savana tropical; Tropical savanna. |
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Thesagro: |
Cobertura do Solo; Uso da Terra. |
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Thesaurus NAL: |
Land cover; Land use. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1152103/1/land-12-00581-v2.pdf
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Marc: |
LEADER 02649naa a2200409 a 4500
001 2152103
005 2023-03-06
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3390/land12030581$2DOI
100 1 $aSANO, E. E.
245 $aEstimating double cropping plantations in the Brazilian Cerrado through PlanetScope monthly mosaics.$h[electronic resource]
260 $c2023
520 $aAbstract: Farmers in the Brazilian Cerrado are increasing grain production by cultivating second crops during the same crop growing season. The release of PlanetScope (PS) satellite images represents an innovative opportunity to monitor double cropping production. In this study, we analyzed the potential of six PS monthly mosaics from the 2021/2022 crop growing season to discriminate double cropping areas in the municipality of Goiatuba, Goiás State, Brazil. The four multispectral bands of the PS images were converted into normalized difference vegetation index (NDVI), enhanced vegetation index (EVI), green-red normalized difference index (GRNDI), and textural features derived from the gray-level co-occurrence matrix (GLCM). The ten most important combinations of these attributes were used to map double cropping systems and other land use and land cover classes (cultivated pasture, sugarcane, and native vegetation) of the municipality through the Random Forest classifier. Training and validation samples were obtained from field campaigns conducted in October 2021 and April 2022. PS mosaic from February 2022 was the most relevant data. The overall accuracy and Kappa index of the final map were 92.2% and 0.892, respectively, with an accuracy confidence of 81%. This approach can be expanded for mapping and monitoring other agricultural frontiers in the Cerrado biome.
650 $aLand cover
650 $aLand use
650 $aCobertura do Solo
650 $aUso da Terra
653 $aCobertura da terra
653 $aConstelação de satélites
653 $aFloresta aleatória
653 $aGray-level co-occurrence matrix
653 $aGRNDI
653 $aLand use and land cover mapping
653 $aMapeamento de cobertura da terra
653 $aMapeamento do uso da terra
653 $aMatriz de coocorrência em nível de cinza
653 $aRandom forest
653 $aSatellite constellation
653 $aSavana tropical
653 $aTropical savanna
700 1 $aBOLFE, E. L.
700 1 $aPARREIRAS, T. C.
700 1 $aBETTIOL, G. M.
700 1 $aVICENTE, L. E.
700 1 $aDEL'ARCO SANCHES, I.
700 1 $aVICTORIA, D. de C.
773 $tLand$gv. 12, n. 3, 581, 2023.
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Registro original: |
Embrapa Cerrados (CPAC) |
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